From: Ryan Davis <ryand-ruby@...>
Date: 2007-01-03T11:33:35+09:00
Subject: Re: Mini-RCR: Extra Argument for Array#join


On Jan 1, 2007, at 8:40 AM, Trans wrote:

> I wonder how this would fair.
>
>   class Array
>     alias :old_join :join
>     def join( sep=$,, last_sep=nil )
>       s = old_join(sep)
>       if last_sep
>         rsep = Regexp.escape(sep.to_s)
>         rlast = Regexp.escape(last.to_s)
>         s.sub!(/#{rsep}#{rlast}$/,"#{last_sep}#{last}")
>       end
>       return s
>     end
>   end
>
> Sorry, the bencmark script wasn't posted and I didn't feel like
> recreating it.

% ./blah.rb 1_000_000
# of iterations = 1000000
                           user     system      total        real
null_time             0.140000   0.000000   0.140000 (  0.139480)
ryan                 19.760000   0.020000  19.780000 ( 19.810269)
trans                21.290000   0.040000  21.330000 ( 21.398592)
Loaded suite ./blah
Started
....
Finished in 0.001109 seconds.

4 tests, 24 assertions, 0 failures, 0 errors